I'm using the Prowl API email address to send an alert to the iPhone app (using iPhone 3GS). Rather than only making a single sound, I would like my phone to continuously buzz or sound so I don't miss the alarm. Is this possibly in any shape or form?

In addition, would it be possible to add an option to ignore the Silent Mode setting (switch on side of device) when the notification priority is "Emergency"? If I have my iPhone on silent mode, I'd still like to be alerted to emergency notifications.